Bump the version of package:web_benchmark (#9721)

Fixes https://github.com/flutter/flutter/issues/183335

packages/devtools_app/pubspec.yaml

diff --git a/packages/devtools_app/pubspec.yaml b/packages/devtools_app/pubspec.yaml
index ce47ca0..c85b949 100644
--- a/packages/devtools_app/pubspec.yaml
+++ b/packages/devtools_app/pubspec.yaml
@@ -76,7 +76,7 @@
   stager: ^1.3.0
   stream_channel: ^2.1.1
   test: ^1.21.0
-  web_benchmarks: ^4.1.0
+  web_benchmarks: ^4.1.1
   webdriver: ^3.1.0
   webkit_inspection_protocol: ">=0.5.0 <2.0.0"